25021011 has 4 divisors (see below), whose sum is σ = 33361352. Its totient is φ = 16680672.

The previous prime is 25020979. The next prime is 25021019. The reversal of 25021011 is 11012052.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25021011 - 2⁵ = 25020979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25021019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4170166 + ... + 4170171.

It is an arithmetic number, because the mean of its divisors is an integer number (8340338).

Almost surely, 2^25021011 is an apocalyptic number.

25021011 is a deficient number, since it is larger than the sum of its proper divisors (8340341).

25021011 is an equidigital number, since it uses as much as digits as its factorization.

25021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8340340.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 25021011 is about 5002.1006587233. The cubic root of 25021011 is about 292.4836662659.

Adding to 25021011 its reverse (11012052), we get a palindrome (36033063).

The spelling of 25021011 in words is "twenty-five million, twenty-one thousand, eleven".